TABLE 1.
General demographic characteristics.
| Variable | LMD group [n = 237 (43.97%)] | MD group [n = 302 (56.03%)] | P |
|---|---|---|---|
| Gender (F/M) | 99/138 | 139/163 | 0.324 |
| Age (years) | 61.22 ± 11.60 | 59.90 ± 12.15 | 0.205 |
| Weight (kg) | 62.64 ± 10.49 | 62.45 ± 10.49 | 0.834 |
| Height (cm) | 165.97 ± 7.18 | 165.44 ± 7.34 | 0.402 |
| BMI | 22.70 ± 2.94 | 22.73 ± 3.04 | 0.906 |
| ASA grades, n (%) | 0.621& | ||
| Ⅰ | 14 (5.9) | 18 (6.0) | |
| Ⅱ | 189 (79.7) | 246 (81.5) | |
| Ⅲ | 34 (14.3) | 38 (12.5) | |
| COPD, n (%) | 8 (3.38) | 12 (3.97) | 0.715 |
| Coronary heart disease, n (%) | 9 (3.8) | 16 (5.3) | 0.411 |
| Diabetes, n (%) | 26 (11.0) | 27 (8.9) | 0.432 |
| Hypertension, n (%) | 71 (30.0) | 71 (23.5) | 0.092 |
| Tumor size | 0.094# | ||
| >5 cm, n (%) | 51 (21.5) | 84 (27.8) | |
| ≤5 cm, n (%) | 186 (78.5) | 218 (72.2) | |
| Depth of infiltration, n (%) | 0.164* | ||
| T0 | 14 (5.9) | 12 (4.0) | |
| Tis | 4 (1.7) | 0 (0) | |
| T1 | 9 (3.8) | 13 (4.3) | |
| T2 | 39 (16.5) | 40 (13.2) | |
| T3 | 74 (31.2) | 104 (34.4) | |
| T4 | 97 (40.9) | 133 (44.0) | |
| Lymph node metastasis, n (%) | 0.058* | ||
| N0 | 157 (66.2) | 194 (64.2) | |
| N1 (1–3) | 46 (19.4) | 68 (22.5) | |
| N2 (≥4) | 34 (14.3) | 34 (11.3) | |
| N3 | 0 | 5 (1.7) | |
| Distant metastasis, n (%) | 0.676# | ||
| Yes | 10 (4.2) | 15 (5.0) | |
| No | 227 (95.8) | 286 (94.7) |
Values are presented as N (column %) or Mean ± SD. &Mann–Whitney U test; #chi-square test; *Fisher’s exact test.
ASA, American Association of Anesthesiologists; BMI, body mass index; COPD, chronic obstructive pulmonary disease.